Fountain pen



Aug.31,1937. W .K, OLSON 2,091,649

FOUNTAIN PEN Filed Ja'n. 4, 1936 Patented Aug. 3l, 19157V l oefen WilburK. Olson, Elmhurst, Ill.:assignor to W. A. Sheaffer Pen Company, FortMadison,4 Iowa, a corporation of Delaware I Application January 4, 1936,Serial No.

(Cl. 1Z0- 47) Claims.

This invention relates to a fountain pen and hasspecial reference to afountain pen in Which the filling mechanism is operated by the rotationof an operating element to produce the suction for drawing the Writingfluid into the barrel of the fountain pen.

More particularly, this invention relates to a fountainA pen including abarrel yhaving filling means therefor comprising an element manually 10operable by a rotation thereof about the longitudinal axis of thebarrel, a flexible member closing the end of the barrel beingreciprocated by a positive means on the manually operable element.

It is desirable in a fountain pen to provide a maximum ink capacity inthe barrel thereof and one in which the filling device takes up only arelatively small portion of the interior of the barrel to permit agreater volume of the barrel to be utilized as an ink reservoir.Further, that the lling mechanism be of such a construction as Willsafeguard against leakage therethrough. The construction disclosedherein contemplates the provision ofa relatively small filling meansincluding a flexible ymember for reciprocation in the direction of theaxis of the barrel bya mem-l ber which is rotatable about the axis'thereof, the flexible member being held about its perimeter in a mannerto obviate leakage and being secured at a medial portion thereof on theoutside of the fluid reservoir to apiston operated by the manuallyrotatable element.

It is one of the objects of this invention to provide a fountain pen ofthe above indicated character in which the filling mechanism thereof isleak-proof and fully housed and protected Within the pen barrel.r

Another object of this invention is to provide a fountain pen of thetypeheretofore referred to .in which a` maximum ink capacity is obtainedwith a relatively small portion'utilized for obtainingthe fillingaction. Y A further object of this invention is to provide a fountainpen of the character noted above which is comparatively inexpensive tomanufacture, and Which is simple in operation.

' Other objects and advantages will hereinafter be more particularlypointed out and for a more complete understanding of the characteristicfeatures of this invention, reference may now be had to the followingdescription when taken together with the accompanying drawing, in whichlatter: y l Figure 41 is a central Vertical sectional View of affountainpenv embodying the features of this invention; f Y

Fig. 2 is an enlarged central sectional View of a fragmentary portion ofthe e'nd of the fountain pen shown in Fig, 1 showing a changed positionof the filling mechanism thereof;

Fig. 3 is' a developed View of the cam of the filling mechanism of thepreceding figures; and

Fig. 4 is an exploded View in perspective of the cam of Fig. 3. l

yReferring now more particularly to the drawing, rthe present inventionis shown as embodied in a fountain pen having a barrel I0 `enclosed onone end by the usual pen section I I, which latter is preferably screwthreaded into the bore of the barrel. The pen section II carries apen-nib lI2 'and the usual feed bar I3, the latter beingprovided with anink channel Which opens Within the barrel and extends outwardlytherefrom to be covered by the pen nib.A The feed bar communicates` witha tube I4, which latter is mounted therein and extends Within the barrelcavity to a point near the other end. thereof. The Writing point end ofthe barrel is provided with exterior threads for engaging `theinteriorlyv ydisposed threads of a cap l5.

The end of the barrel opposite to the writing `point endis providedpreferably with an-enf.

larged threaded bore for engaging threads -on a reduced extension of thehousing Iii., By `reason of the reduced extension of the housing .1|li., itis possible to form the outer surface thereof coextensive Withthe outer diameter ofthe barrel.

A washer I7 preferably of a non-corrosive metal 'is disposed at theshoulder formed by the junctureof the enlarged threaded bore with ,thereduced bore of the barrel for providing a seat-vy upon Which theperipheral edge I8 of a flexible diaphragm I@ may be engaged.k Theflexible diaphragm I9 is held against displacement by means of a flange2| of thesleeve 22 bearing thereagainst, and compressing thel peripheraledge thereof against the metal Washer Il. The flange 2l, in turn, isurged against the peripheral edge of the flexible diaphragmy by thethreaded extension of the housing I 6. Y Y

The flanged sleeve 22 is fixed against movement both `in the directionof the `axis of the rbarrel and against rotation in the direction aboutthe axis'thereof. A piston 23 is mounted for reciprocationin the bore ofthe sleeve 22, the piston being held against rotation therein and being`guided in its reciprocal movement by a pin 24 complished by a rotatablemovement of a tubular element 26, which latter is provided With a camelement 21 shown more particularly in Figs. 3 and 4:. The cam ispreferably formed in two separate portions, one portion 21a thereofhaving an inclined surface 28 along which the pin 24 rides to move thepiston 23 in a direction away from the writing point end of the fountainpen, and the other portion 2lb of the cam having an inclined surface 29for engaging the pin 24 and directing the same in an opposite directionto move the piston toward the writing point end of the fountain pen.Thus a positive means is provided for reciprocating the piston 23.

The cam member formed of the two portions 21a and 2lb may readily be xedwithin the tubular member 26 in any well known manner such as by a forcefit and may occupy a fixed relation therein by means of the flange atthe ends of the cam portions, the flange of the portion 21h limiting themovement of the cam inwardly to a spaced distance from the portion 21a,which latter likewise is limited in its movement into` the bore of thetubular portion by its flange. The flange on the cam portion 2'!a maycontain a depression 28@ in which a spring pressed detent may beengaged, the latter being, for example, in the form of a spring pressedball 29 seated in the flange 2| of the metal sleeve 22. Such means mayindicate the initial position of the rotative movement of the cam or thelowermost point of the pin 24 on the cam surface 28.

The tubular portion 2S together with its cam portions 21a and 2lb whichare fixed therein are rotatable on the sleeve 22. Also, the tubularportion 2B and associated cam 21 rotate Within the housing l 6. In orderto prevent endwise displacement of the tubular member 26, the housing I6is provided with a reduced bore 30 at its outer end for providing ashoulder which engages a shoulder provided by a reduced extension 3| ofthe vtubular member 26.

In order to manually operate the tubular member 26 and its xed camtherein, a cap 32 fixedly engages the reduced extension 3l and may beheld thereon merely by engaging threads or by a cementitious material orother locking means.

The flexible diaphragm I9, fixed at its peripheral edge to the barrel toseal the end thereof, is connected at a medial portion thereof outsideo-f the barrel proper to the piston 23 by means of a cementitiousmaterial or other well known means and the diaphragm is flexed orreciprocated by the piston. In the operation of the fountain pen to fillthe same, the cap 32 is rotated preferably in a continuous direction torotate the tubular member 26 and cam 21. The cam engages the end of thepin 24, which latter projects through the longitudinally extending slot25 in the sleeve to move the p-in and thereby to operate the piston in areciprocal movement 1ongitudinally or in the direction of the axis ofthe barrel. 'I'he piston is held against rotatable movement by thelongitudinally extending slot 25 and is thereby merely operated in alongitudinal direction, The flexure of the diaphragm creates a suctionfwithin the barrel todraw ink therein and the rotation of the cap iscontinued until the barrel is nued with ink.

While but a single embodiment of this invention is herein shown anddescribed, it is to be understood that various modifications thereof maybe apparent to those skilled in the art Without departing from thespirit and scope of this invention and, therefore, the same is only tobe limited by the scope of the prior art and the appended claims.

I claim:

1. In a fountain pen having a barrel, filling means therefor comprisingan element manually operable by a rotation thereof about thelongitudinal axis of the barrel, means movable longitudinally of thebarrel, a flexible member closing the end of the barrel and connected tosaid longitudinally movable means, and positive means on said manuallyoperable element for connection with said longitudinally movable meansfor reciprocating said flexible member.

2. In a fountain pen having a barrel, filling means therefor comprisingan element manually loperable by a continuous rotation thereof about thelongitudinal axis of the barrel, means movable longitudinally of thebarrel, a flexible member closing the end of the barrel and connected tosaid longitudinally movable means, and positive means on said manuallyoperable element for connection with said longitudinally movable meansfor reciprocating said flexible member.

3. In a fountain pen having a barrel, filling means therefor comprisingan element manually operable by the rotation thereof about thelongitudinal axis of the barrel, means movable longitudinally of thebarrel, a flexible member closing the end of the barrel and connected tosaid longitudinally movable means, and cam means on said manuallyoperable element for connection I with said longitudinally movable meansfor reciprocating Vsaid flexible member in the direction of the axis ofsaid barrel.

4. In a fountain p en having a barrel, filling means therefor comprisinga fixed sleeve, a piston having reciprocal movement in said sleeve,guiding means between said sleeve and said piston to direct longitudinalmovement of said piston and to prevent rotation thereof, a flexiblemember closing the end of the barrel and secured to said piston, and anelement manually operable by the rotation thereof about the longitudinalaxis of the barrel for reciprocating said piston and thereby saidflexible member.

5. In a fountain pen having a barrel, filling means therefor comprisinga fixed sleeve, a piston having reciprocal movement in said sleeve, saidsleeve having a slot extending in the direction of the axis thereof forreceiving a pin fixed on said piston to direct longitudinal movement ofsaid piston and to prevent rotation thereof, a flexible member closingthe end of the barrel and secured to said piston, and an elementmanually operable by the rotation thereof about the longitudinal axis ofthe barrel for reciprocating said piston and thereby said flexiblemember.

6. In a fountain pen having a barrel, lling means therefor comprising asleeve fixed on said barrel having an axially extending slot, a pistonhaving reciprocal movement in said sleeve and having a pin extendingthrough said slot for guiding the movement of said piston, a flexiblediaphragm having the peripheral edges thereof secured to said barrel forclosing the end thereof and having a medial portion fixed to saidpiston, and an element manually operable by the rotation thereofaboutthe longitudinal axis of the barrel for reciprocating said piston andthereby said flexible diaphragm.

7. In a fountain pen having a barrel, filling means therefor comprisinga sleeve fixed on said barrel having an axially extending slot, a pistonhaving reciprocal movement in said sleeve and having a pin extendingthrough said.- slot for guiding the movement of said piston, a flexiblediaphragm having the peripheral edges thereof secured to said barrel forclosing the end thereof and having a medial portion fixed to saidpiston, and a tubular member surrounding said sleeve having means forengaging said piston, said tubular member being manually operable by therotation thereof about the longitudinal axis of the barrel forreciprocating said piston and thereby said flexible diaphragm.

8. In a fountain pen having a barrel, filling means therefor comprisinga sleeve xed on said barrel having an axially extending slot, a pistonhaving reciprocal movement in said sleeve and having a pin extendingthrough said slo-t for guiding the movement of said piston, a flexiblediaphragm having the peripheral edges thereof secured to said barrel forclosing the end thereof and having a medial portion fixed to saidpiston,

land a tubular member surrounding said sleeve for rotation thereon, saidtubular member having a cam on the inner periphery thereof for engagingsaid pin and the manual rotation of said tubular member reciprocatingsaid pin to operate said piston and thereby to reciprocate said exiblediaphragm.

9. In a fountain pen having a barrel, lling means therefor comprising aflanged sleeve having an axially extending slot, a piston havingreciprocal movement in said sleeve and having a pin extending throughsaid slot for guiding the movement of Said piston, a flexible diaphragm,a housing for locking the flange of said sleeve against the peripheraledge of said diaphragm to close the end of the barreland to fix saidsleeve against movement, a medial portion of said flexible diaphragmbeing secured to said piston, and an element manually operable by therotation thereof about the longitudinal axis of the barrel forreciprocating said piston and thereby said flexible diaphragm.

l0. In a fountain pen having a barrel, filling means therefor comprisingan element manually operable by a rotation thereof about thelongitudinal axis of the barrel, means movable longitudinally of thebarrel, a exible member closing the end of the barrel and connected tosaid longitudinally movable means,` positive means on said manuallyoperable element for connection with said longitudinally movable meansfor reciprocating said flexible member, and stop means for indicatingthe initial position of said rotating movement.

WILBUR K. OLSON.

